防爆标志Ex-marking：ExdⅡBT6 Gb;DIP A20 Ta,T6

外壳材质：无铜铝合金铸造，碳钢，抛丸，聚脂静电喷塑

Enclosure: Die-casted with aluminum alloy without copper, carbon steel, shot blasting, electrostatic ployester-sprayed